 
     ; Update Select2 box, since this is not done in `add-module-lesson-group!`.
     ; Repeated work will be done there if we did so
-    (select2-box-update-modules)
+    (select2-box-update-modules!)
     ; Update url hash
     (set-document-location-hash-based-on-modules-order!)))
 

                    ; Micro optimization for modules added via url hash
                    ; during initialization
                    (if (not addedViaUrlHashInit?)
                        (select2-box-update-modules))))

              ; Only lesson types with more than 1 option of lesson group
              ; will be draggable

  (timetable-create!)
  (reset-ModulesSelected!)
  (reset-ModulesSelectedOrder!)
  (select2-box-update-modules!)
  (document-location-hash-reset!))
